During a joint operation between International Rescue and the Global Defence Force, a series of mishaps nearly ends in disaster. In the wake of the botched mission, Colonel Martin Janus takes over the GDF...

International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

Gordon travels in Thunderbird 4 to recover Braman but discovers that the Chaos Crew have gotten to the robot first. An underwater battle ensues and both Thunderbird 4 and Gordon are harmed.

Gordon ventures deep into the Marianas trench to rescue a survey team, and ends up discovering an early International Rescue prototype vehicle once flown by Jeff Tracy. Gordon takes Thunderbird 4 down to save the crew and get a better look at the prototype. But the survey ship, designed by The Mechanic, transforms and wrecks Thunderbird 4. Gordon is forced to abandon ship and seek refuge on his dad’s TV-21 plane. To save the survey crew, Gordon powers up the plane and manages to take it up to the surface.

International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

When a transport ship carrying colonists heads straight into the asteroid belt between Mars and Jupiter, Thunderbird 3 is deployed to regain control.

Lady Penelope brings John as her guest to a charity event while Gordon and Alan take the watch aboard Thunderbird 5.

Through the use of archive footage, Brains informs the team of a discovery, but in order to gather more information, our heroes split into groups and search for an escape pod missing since Jeff Tracy's crash.

Thunderbirds 3 and 4 are need on Europa, one of Jupiter's moon, when a pair of documentarians fall into an ice ocean. This leads Alan to make first contact with an alien lifeform.

After the Mechanic flees the scene with the TV-21, Scott is in hot pursuit. But, when the villain steals some volatile iridium, Brains must make drastic alterations to Thunderbird 3 to save the day.

Lady Penelope, Parker and Kayo arrive on the scene of a massive semi-submersible ocean oil rig to decommission the polluting relic, but supervisor Malloy has other plans.

IR receives a distress call from the Calypso, a space vessel returning from a long mission. Scott and Virgil get aboard the plummeting ship and locate the disoriented crew along with an old robot named Braman, who sent the original distress call.

In order to build a T-drive engine for the Zero-X, Brains needs help from the Mechanic. The trouble is, the Mechanic is locked inside a space prison known as the Hex.

In London the Crystal Spire, the tallest building in the world, catches fire due to an electrical overload and the local firefighters are rendered helpless. Virgil and Alan are called to extinguish the flames and rescue everyone trapped inside.

International Rescue have to stop the failure of a dam when The Mechanic sabotages it, but he is not the only threat they will face.

When the first run of an inventor's newly-constructed hyperloop begins to malfunction, Scott must try to find a way to slow down the fast-moving ride.

When disaster strikes International Rescue answers the call! The Mechanic, having completed Project Sentinel, sets his sights on destroying The Hood. While International Rescue scramble to save their former foe, Brains goes on a dangerous mission to stop the Mechanic once and for all.

The chase is on and Kayo and Alan work quickly to re-capture Thunderbird 3 from Havoc. Meanwhile, Scott's efforts to extract the escape pod run into additional complications.

All of International Rescue take a retreat for training at their family ranch on the main island. During training the equipment malfunctions, MAX goes crazy and both the Thunderbird ships and FAB 1 stop working. John, Brains and EOS work together to trace the fault and discover that they have an intruder, The Mechanic!

A geological survey team gets trapped when a huge earth-breaking vehicle, controlled by a villain known only as the Mechanic, causes them to fall into a narrow crevice. As International Rescue mobilise, Lady Penelope and Parker visit the Hood in Parkmoor Scrubs prison to find out more about this mysterious new villain.

A family becomes trapped in a city that is being overtaken by rising ocean tides.

A comet brought into the Earth's orbit takes a wrong turn. International Rescue must intervene to stop it from colliding with the planet - and the space station between them.

The Tracys receive a distress call from the crew of a cargo zeppelin. A giant loading claw malfunctioned and has started attacking anything that moves. Thunderbird 1, 2, and Shadow launch out in an attempt to land the ship safely. But the zeppelin contains a dangerous fuel source and there are still crew members trapped near the loading claw. Scott makes it to the cockpit of the zeppelin while Virgil begins to offload the fuel source. Kayo puts on a mech suit to deal with the loading claw while the crew escape. Ultimately, they put the zeppelin down outside city limits and escape just before it explodes.

Disasters around the globe leave only Brains free to investigate when Dr. Quentin Questa makes his annual claim that an Icelandic volcano is about to erupt.

On Mars a landslide traps Captain Taylor and a scientist in a cavern. Alan and Virgil fly to the red planet and assist with the aid of Thunderbird 3 and a specialised Exo-Pod. However, circumstances in the cave lead Virgil to eject the air in his suit, leaving our heroes short on air inside a leaking cave.